Here are quick play throughs of all the mods/levels I've made so far and hacked into Doom ROMs. A few of the videos have some lag but only because my laptop couldn't handle running PT and Fraps simultaneously during some of the more intense sections that even real hardware has slight problems with. Although the cool thumbnails aren't displayed, I've included the descriptions of each from their respective Youtube page.
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These are from the 1st ROM set of the 1st trilogy:
*Jaguar Doom hack: set 1, ROM 1, level 1
I made this map while learning how to use Doom Builder 2 in December 2016. Decided to use it as the opener for the entire upcoming series of maps I'm hacking into the Atari Jaguar's Doom wad.

*Jaguar Doom hack: set 1, ROM 1, level 2
2nd map I made while learning how to use Doom Builder 2 in December 2016. Hacked it inline as #2 in the series of maps I'm hacking into the Atari Jaguar's Doom wad. A nice destructive path to the end with a ground level and hell level that each must be completed to move forward.

*Jaguar Doom hack: set 1, ROM 1, level 3
A good first level inside the complex. This map is reminiscent of the original ID levels and isn't overly difficult (unless your playing on Nightmare! Good luck with that lol)

*Jaguar Doom hack: set 1, ROM 1, level 4
The first larger level in the series. Not overly huge but a leap forward in size with a maze portion I conveniently don't enter as to leave something to the imagination. Nice battle at the end really heightens the intensity..

*Jaguar Doom hack: set 1, ROM 1, level 5
This one goes back and forth from inside part of a base to outside overlooking poisonous pits under a beautiful Martian sky. This level has several blast doors that can be used (when not cheating with God Mode) to attack demons from relative safety. It can be tricky to use them but well worth the effort to master using.

*Jaguar Doom hack: set 1, ROM 1, level 6
The first of quite a few large levels that were unexpectedly possible on this console. It took a lot of work to make it happen but gave me a better understanding of the limitations and what was necessary to make it run without lag. One of my personal favorites...

*Jaguar Doom hack: set 1, ROM 1, level 7
Attacked from the beginning with no time to prepare, this complex labyrinth has many secrets and even more traps. Only by chance (a fairly high chance) can some doors be triggered which adds to the challenge of getting 100%. But, by the end of this level most gamers will be glad to just survive

*Jaguar Doom hack: set 1, ROM 1, level 8
Another beauty of a level with many secrets hidden in place sight. Tough battles and endless new doors to open around every corner make complete exploration of this vast complex a challenge within existing challenges.

*Jaguar Doom hack: set 1, ROM 1, level 9
A larger level with it's own unique aspects and puzzles. Plenty of enemies in the trenches even on lesser difficulties. It's a joy to charge through this beast killing everything in your path..

*Jaguar Doom hack: set 1, ROM 1, level 10
Although not necessary to explore every room or open every door to complete, the rewards for doing so are excellent. Some of the finest details I've seen in maps lately..

*Jaguar Doom hack: set 1, ROM 1, level 11
Underground in the now abandoned hydroponics section of the complex, only evil remains. This level is a lot shorter than the ones leading up to it but make no mistake, these demons will do everything they can to prevent you from passing this area

*Jaguar Doom hack: set 1, ROM 1, level 12
After exiting the hydroponics area through the lower level we end up in what used to be a system of aqueducts and flood control for the main base. With nowhere to go but forward, fight your way to the well guarded blue key and make this amazing map a memory..

*Jaguar Doom hack: set 1, ROM 1, level 13
Finally at the last hurdle before clearing this area and moving on to the next. But this is no cake walk as the elusive blue key stands in the way of progressing forward. That, and a slew of pissed off demons doing all they can to make sure you die here...

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These are from the 2nd ROM of the 1st trilogy
*Jaguar Doom hack: set 1, ROM 2, level 1
1st stage of the 2nd ROM in this trilogy and straight into the fight. This wasn't going to get any easier and now topside again, the battle rages on. This map is large with some of the best lighting effects to date, later in the level. Again searching for the blue key, all hope seems lost... In the video you'll see me think twice about attempting to access a certain area. Although very rewarding, wasn't worth the attempt while making a video as in this level, there's no escape if you fall in...

*Jaguar Doom hack: set 1, ROM 2, level 3
Another smaller level that can be blazed through relatively quickly. There's a lot more to this one than what's shown here as I did the minimum necessary to finish it... Well worth some serious exploration.

*Jaguar Doom hack: set 1, ROM 2, level 4
This level is a bit larger than the last two and has plenty to offer in the way of figuring out what's next and how to survive those choices. I took the secret exit on this one leaving the regular exit to be discovered...
After level 24, this picks right back up on level 5

*Jaguar Doom hack: set 1, ROM 2, level 5
Smaller but interesting level. Once all the damage is done, could wander for hours looking for that way out. First time I went through I didn't realize backtracking was the key..

*Jaguar Doom hack: set 1, ROM 2, level 8
In typical "Map 08" style this is a small map with a boss battle leading to the use of special tag 666 to drop some walls when they're dead. Easy enough if you know where to find some weapons but difficult as to which is the best way to fight. Stay high with cover or dive in and go to town on them? Hmmmmm...

*Jaguar Doom hack: set 1, ROM 2, level 9
A short level with plenty to solve. Getting 100% on here is the goal but can be a major challenge if you're not fast enough. A little lag early on but surprised it wasn't worse considering how many free standing items there are coupled with the overall length of the map... A nice testament to the Jaguar's power.

*Jaguar Doom hack: set 1, ROM 2, level 10
An outstanding level in my opinion. Have to circle it twice to complete it which keeps it tight yet not repetetive since new enemies appear after different triggers have been activated.

*Jaguar Doom hack: set 1, ROM 2, level 12
An epic arena to have an epic battle in, this is the demons' final stand to keep you from entering the next area. Based outside in an open world, everything stands in your way. This one ain't gonna be no walk in the park!

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These are from the 3rd ROM of the 1st trilogy:
*Jaguar Doom hack: set 1, ROM 3, level 1
This map is huge :0
Originally placed as an epic ending to another ROM, decided to put it 1st in line of the final ROM for this trilogy. Nothing like the battle of all battles to start things off and give an impression of WTF did I get myself into?....

*Jaguar Doom hack: set 1, ROM 3, level 2
A medium sized map with all the enemies, traps and secrets you've grown accustom to. Not bruatlly difficult but now walk in the park, this map is another testament to the Jaguar's power by handling the huge open rooms without a hitch.

*Jaguar Doom hack: set 1, ROM 3, level 3
An awesome map with an elevator maze. There's a lot more to it than shown here but I wanted to keep the video short. Also, a little mystery doesn't hurt. Like, what's that letter N for???

*Jaguar Doom hack: set 1, ROM 3, level 4
Another excellent map and a fairly larger size. Tons of doors to find and open along with the usual amount of demons roaming the hallways. My favorite parts are the large open outside area near the beginning of the video and that lovely yellow key trap LOL.

*Jaguar Doom hack: set 1, ROM 3, level 5
Larger map with a ton of traps and a huge pyramid to scale. Took quite a while to get the textures aligned on that baby but well worth it. And how about that arena at the end? A whole new level of fighting for survival

*Jaguar Doom hack: set 1, ROM 3, level 7
Fairly large level with some tense moments. Especially that maze walk at the end (which, to get 100% kills you'll have to jump off the side and take care of a few of the possessed.) Great fun and a lot to explore..

*Jaguar Doom hack: set 1, ROM 3, level 10
A close quarters death run if ever one existed :p
The decor is changed as our hero heads to the lower levels of this latest base to ensure the death of every single demon. Using the camouflaged blast doors here is a must..

*Jaguar Doom hack: set 1, ROM 3, level 11
An incredible map. This one was even fun to convert. The visuals are great and it flows perfectly all the way to the narrow walk at the end when those cave walls open up leaving you in a most precarious position.

*Jaguar Doom hack: set 1, ROM 3, level 12
After ruining the demons' plans for taking over this part of Mars, you've just entered the space port. The plan is to take out the remaining enemies here, hijack a space ship and leave this rock but some of the most brutal battles lie ahead. After ripping and tearing through so many of their horde, the last thing they want is for you to board that ship...

*Jaguar Doom hack: set 1, ROM 3, level 13
Finally.. the ship-and the final level of this trilogy.. Now aboard the Cacodemons finest transport, you find yourself in a confusing maze of sameness wondering if you can figure out how to access the forward cockpit controls. Slaying everything aboard seems the only solution. They appear from every corner of the hallways to the brig you accidentally opened by randomly flipping switches in the control room. A relentless onslaught of heathens for you to decimate.

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These are from the 2nd ROM set (which is a single 12 mission ROM atm):
*Jaguar Doom hack: set 2, ROM 1, level 1
After the epic battle aboard the Cacodemon ship, you learn that the craft won't stay aloft without the collective minds of the demons to control it. It crashes far from the spaceport before leaving the planet. Nearby is a series of structures and running out of air, you enter cautiously. A small map of what appears to be a weapons manufacturing facility..

*Jaguar Doom hack: set 2, ROM 1, level 5
This is a great map imo. Was a blast converting it and making it work. Took a while to pull off and reduce the lag to what's visible in the video but well worth it and a masterpiece if I do say so myself. Some close quarter fighting coupled with more and more enemies appearing every time you finish clearing a section makes for some serious fun.

*Jaguar Doom hack: set 2, ROM 1, level 7
Ever larger map with floors heading vertically. This one ups the elevator frustration into madness. This video is of the 2nd time I recorded as I got lost during the 1st run and had to go back and check the original map to remember what to do and where to go. It's all about the blue key here... like so many before it

*Jaguar Doom hack: set 2, ROM 1, level 8
This map is a standard #8 with the lowering walls and special 666 tag but it is one tough beast! Literally dropping into the party it's a nightmare from that moment on. Grab the ammo and go to obliterating before the Radiation Suit wears off-all the while dodging some of the most brutal savagery in the entire series!

*Jaguar Doom hack: set 2, ROM 1, level 9
Very small map with some innovative gameplay. Managing the Lifts while evading poison and enemies all while searching for keys amongst the dead and bloody bodies is a skill that has to be learned :p

*Jaguar Doom hack: set 2, ROM 1, level 10
Leaving the small maps that made up most of this set, we head into an underground labyrinth with plenty of secret doors, only some of which are shown here. Viewing your map is essential for navigating this dark and cruel place..

*Jaguar Doom hack: set 2, ROM 1, level 11
More of a test of fighting skill than the usual puzzle solving+killing, this map is trite smaller than the last but the battles are intense and seemingly never ending. That large cavern with the Cacodemons is just unpleasant. Lol

*Jaguar Doom hack: set 2, ROM 1, level 12
And here it is, the final level of the 2nd set of maps. This one isn't a trilogy like the 1st set (yet), but has its moments. A nice break from the ever growing maps of the last ROM set. This map is large and by no means a cakewalk. Locating those keys to finally venture out of here is rewarding bc they are hidden and guarded well.

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These are from the 1st ROM in the 3rd set (which is a trilogy):
*Jaguar Doom hack: set 3, ROM 1, level 1
So, out with the small maps and right back into the mix of a stronghold base setting with plenty of area to explore and puzzles to solve. This is the 1st map of the 3rd set. It's another trilogy consisting of 3 ROMs for a total of 36 'soon to be' classic missions..

*Jaguar Doom hack: set 3, ROM 1, level 2
Another amazing map. A few of the rooms here are unique in design and features which makes them stand out to me as gems in this series. I can't get enough of this large level even after having played it hundreds of times..

*Jaguar Doom hack: set 3, ROM 1, level 3
Excellent level with some outdoor exposure. Love fighting across that bridge to the other end! Some extra places to go there at the end but all roads lead home :p

*Jaguar Doom hack: set 3, ROM 1, level 4
Absolutely brilliant level design. Always a pleasure to tear through this map and destroy every evil thing in sight. from domino-ing explosive barrels, uncovering that elusive blue key, being mauled by a rush of Pinky Demons to triggering the speed trap for a cache of much needed heavy weapons, this map has it all..

*Jaguar Doom hack: set 3, ROM 1, level 5
A fantastic mega-level ready to pillage and destroy. Took me a while to find the right order to accomplish tasks in but once that was out of the way, it was strictly rip and tear. Love the yellow key teaser when that door half opens. So close but so far away, as we soon find out having to battle our way around just to get a shot at it. All the way to the end-they just keep coming..

*Jaguar Doom hack: set 3, ROM 1, level 6
Pretty massive level here. Attacked from all sides nearly from the start, this huge and well made base map will test your awareness of the surroundings. A few key triggers hidden in plain sight and on my first ROMp through here I missed a few of them and gave up. A great place to hone your observation skills. Very clever putting a shortcut back to the red door via the pile driver room..

*Jaguar Doom hack: set 3, ROM 1, level 7
Large and well designed level. Favorite part is entering the outdoor area and seeing both the 2nd story on the left with its stairs leading up and the protected elevated platform on the right with its guard opening fire at first sight of you. All below that incredible Martian sky. A feast for the eyes indeed..

*Jaguar Doom hack: set 3, ROM 1, level 8
A fairly brutal Map 8. When those doors open and the evil is unleashed there's no turning back. Literally, since the lift you took to get up here is apparently a one way ride. There's only one way out and that's THROUGH :p

*Jaguar Doom hack: set 3, ROM 1, level 9
A super small map that's pretty cut and dried with the goals. One door you can enter from the start and the rest unfolds from there. A few secrets to discover though..

*Jaguar Doom hack: set 3, ROM 1, level 10
Slightly larger level with enough twists and turns to keep it interesting. Plus, the ever present amount of enemies is more than adequate to make the run n' gun portion a great addition to the series..

*Jaguar Doom hack: set 3, ROM 1, level 11
A perfect sized complex. Not too big leaving the player confused and exploring for hours but large enough to keep the battling parties spread out enough that heavy weaponry isn't a problem. Enemies at every turn make this an epic display of demon killing to the end

*Jaguar Doom hack: set 3, ROM 1, level 12
Final map of the 1st ROM in this trilogy and like the others before it, not gonna be easy. The outside area here is phenomenal imo. I left out a semi-obvious secret on the upper part of the outside ledge. You can see me 'zoom in and out' on the suspect ledge then leave. No telling what's back there...

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These are from the 2nd set of 3rd ROM set trilogy:
*Jaguar Doom hack: set 3, ROM 2, level 1
The 1st map of the 2nd ROM in this trilogy One of the best levels I've played to date too. Hell, this whole 2nd set is some of the best. playing this on Hurt Me Plenty is ideal and an excellent challenge..

*Jaguar Doom hack: set 3, ROM 2, level 2
Excellent level that moves from the 'comfort' of a base into the bowels of hell and back. Plenty of secrets left to make earning 100% a massive undertaking in itself..

*Jaguar Doom hack: set 3, ROM 2, level 3
This one literally starts out with a bang being trapped in there with 2 Pinky Demons. May not even survive the 1st room let alone this epic monstrosity of world class architecture. So much to kill and so little time..

*Jaguar Doom hack: set 3, ROM 2, level 4
One of my favorite maps! It has everything.. and a lot of red brick walls. Fraps causes this recording to lag badly toward the end but still a good representation of what the level is like. Some incredible design here and the ever flowing enemies even AFTER the epic battle for the red key in that deadly arena. Awesome..

*Jaguar Doom hack: set 3, ROM 2, level 7
More close quarter fighting. That rocket launcher won't work in the real world but there's plenty of other weapons to decimate everything in sight. The backpack seems oddly out of place at the end there..

*Jaguar Doom hack: set 3, ROM 2, level 9
A nice sized map with demons around every corner. Nice touch with the thin walkway rising to reach the yellow door. Ironically, that's the 1st time I made it onto the walkway on the 1st attempt. Tricky little area usually takes multiple tries but is critical in progressing forward..

*Jaguar Doom hack: set 3, ROM 2, level 10
Aaaaand another freakin boss level. Well designed and stocked with weapons, you're going to need all you can get. This is no walk in the park by any means so taking it on with the difficulty setting of "I'm a wimp" is recommended. Come on, no one will laugh :p

*Jaguar Doom hack: set 3, ROM 2, level 11
Boss level in some tight areas to make those close quarter battles even more daunting! Without the God Mode, retreat is the best idea. Know your surroundings and haul ass to put a door between you and them as the only sane survival tactic. Making your way back to the opening area to proceed was just mean lol. I spent ages searching on my 1st ROMp through this level :p

*Jaguar Doom hack: set 3, ROM 2, level 12
The last map of the 2nd ROM in this trilogy and what a fierce map it is.. Attacked from the start by Imps to the messed up blue key trap that let's the friggin wall down next to you, exposing you to multiple enemies (LOL) to that amazing arena at the end. And if you want 100% kills you'll either have to find a way to take out the remaining Pinky Demons from the safety of the elevated area or dive into the poison and let 'em have it from there. Awesome level!

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These are from the 3rd set of 3rd ROM set trilogy:
*Jaguar Doom hack: set 3, ROM 3, level 1
First map of the final ROM set in this trilogy, and what an opening level. An epic map with plenty of death to deal out. A few tricks and secrets scattered about but carefully navigating those narrow catwalks is a must. There's just enough room to fall off the sides and you'll be trapped without the usually inevitable death screen since these only contain water :p

*Jaguar Doom hack: set 3, ROM 3, level 2
Although a smaller map, it makes up for it in brutality. The tight squeeze between the broken barrier and wall to recover the BFG 9000 to the confusion of returning to the exit room once you hear the door conveyor open. An excellent close quarter map to open on the enemy with whatever you have at your disposal..

*Jaguar Doom hack: set 3, ROM 3, level 3
Smaller map and deadly boss enemies. More secrets than were displayed in this run through. Well worth seeking out. Side stepping that Invicibility icon is imperative to surviving that final onslaught even though it's funny as hell to watch a noob run right in, grab it and die immediately after triggering the switch to unleash those Barons of Hell :p

*Jaguar Doom hack: set 3, ROM 3, level 4
A break from the heavy hitting enemies and a perfect sized map to pillage through letting these demons know you mean business :p Opening the secret wall/gate near the exit to collect the deads' weapons adds insult to injury

*Jaguar Doom hack: set 3, ROM 3, level 5
Set in hell, this level offers some ace map design to explore. Using the blast doors to sneak attack the plethora of enemies in the adjoining room makes all the difference for successfully navigating this stronghold. Radiation suits in key locations keep you from burning alive in the lower levels but while down there, ensure that you take out all enemies on the upper level before using the lift to get to the exit as it's a one time only ride up and if you get knocked off it's game over..

*Jaguar Doom hack: set 3, ROM 3, level 6
An average sized map where confusion abounds (as you can see my circling of the same area a couple of times :p) The narrow maze hallway is actually lined with explosive dominoing barrels that inevitably clear the area-which is a much needed bonus here. The yellow key becomes the goal of the mission and finding it is an ordeal all in itself..

*Jaguar Doom hack: set 3, ROM 3, level 7
Another excellent map with enemies around every corner. Using the right doors to enter areas at certain intervals can put quite a bit of distance between you and the heavy hitters, letting you pick them off with ease. The large open area to the south is deceiving as is discovered once you obtain the red key and all hell breaks loose

*Jaguar Doom hack: set 3, ROM 3, level 8
Attacked from behind at the start, luckily that wall is a bit too high for the Cacodemon to take you out right away. The goals are cut and dried but navigating the outdoor maze can be a deal breaker and drive an average gamer insane. Just pay attention to the irregular looking walls and check the map to figure it all out. A nice touch with the misplaced steps and health bonus ridden cavern...

*Jaguar Doom hack: set 3, ROM 3, level 9
This is the level to end all levels. A mega boss map with two keys-each being a massive undertaking to acquire. The enemies are relentless and they just keep on coming! Plenty of trap doors lead to certain doom with a constant barrage of enemy attacks to make this one the ultimate effort to traverse. For the completionists out there, good luck getting 100% kills in here. You'll need it...

*Jaguar Doom hack: set 3, ROM 3, level 10
Set partially in a base and hell alike, this large complex is tricky in finding out where to go next. Returning from the 1st outside area has a caveat as well making multiple attempts standard practice for the first go around. Exploring every inch is imperative to discovering its secrets, which there are quite a few of...

*Jaguar Doom hack: set 3, ROM 3, level 11
A tight set of hallways appear in the 1st part of this map. Equal weapons caches and boss arenas on the opposite sides of the doors in the center. Radiation suit management can be the means to an end here, good or bad as the arenas are a tough bit of fighting to overcome. Once you let them know you're here, retreating won't necessarily keep them at bay as the Cacodemons will float over and open the door to track you down. About the crusher, it's a nice way to smash the enemies in the center but can also be an encumbrance later on. You don't HAVE to trigger it...

*Jaguar Doom hack: set 3, ROM 3, level 12
The 84th and final map of this 7 ROM series. Relatively small considering it's the 'big finale' but we all know the Doom Marine's mission is never over. At the end of it all this one gives you the choice to teleport to Heaven, back to Earth or into the bowels of hell to continue the fight. Choose wisely... :p

The wads in these hacks are uncompressed which is why there's only 12 levels.

I actually found the compression decompression file one time that id used and lost where it was stored.

What came after the Jaguar was the PS1 which for all it's greatness, ushered in corporate development and with it the bleached, repetitive, bland titles which for the most part we're still playing today. - David Wightman

LOL they're all compressed. I only did 12 to 13 maps each because some of them were so enormous, #14 would have exceeded the original allotment of code usable to put them in. Overwriting the data for map 24 causes sound sample issues so you can really only overwrite to the end of map 23 safely.
The Doom 32X hack has all 17 of its maps and they fit nicely. I made the excel sheet I use to do these calculate up to 18 maps but can make it indefinite. The above method keeps it at a nice consistent (mostly) map set instead of 20 maps on this rom and 12 on another, etc.

Oh I thought this was the original ggn hack. I know his only had 12 because they were uncompressed in the ROM.

Maybe with the SD card you can have all the levels you want

What came after the Jaguar was the PS1 which for all it's greatness, ushered in corporate development and with it the bleached, repetitive, bland titles which for the most part we're still playing today. - David Wightman

Cool, I didn't know ggn did a hack. I'd only ever heard of neo_rg doing them. His guide is where I learned this. Pretty interesting read.
I added massively to it here and worked out most of the redundant issues making it even simpler to crank out levels at an accelerated pace. I wish more people were making these...

You figured out how to compress the levels then decompressed them? Impressive. I know in his original tutorial they were uncompressed.

What came after the Jaguar was the PS1 which for all it's greatness, ushered in corporate development and with it the bleached, repetitive, bland titles which for the most part we're still playing today. - David Wightman

Yes, the original tutorial had them uncompressed. I followed that tutorial the end but there was a 2nd part not in the tutorial that I was given access to where the compression came into play. It was an integral part of making it work in the end so I outlined the process in my thread on RVG for anyone else that got to that point and wanted/needed the info. neo_rg didn't mind and I have to assume I'm the only person who took the original tutorial to the end and was willing to invest the time to make these happen. Which is sad since if more people were doing it there's no telling what kind of awesome levels we'd have out there